Page 1038 - Basic Electrical Engineering
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Figure 15.6 A bridge rectifier circuit for full-wave rectification using four diodes and a transformer

                  During the positive half cycle of the input voltage, terminal A of the
               transformer is positive. Current will flow from the positive terminal through

               diode D , load R  and diode D , and back to the negative terminal, B of the
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               transformer. The direction of current through the load has been shown to be
               from C to D, i.e., from top to bottom. The polarities of the load terminals
               have been shown. During this period diodes D  and D  are reverse biased.
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